during ‘destroy’, remove event handlers added with ‘.on('sortupdate', …)’
Use detach instead of hide on the dragged element

This wont mess up any styling using :first-child or stuff
fix incorrectly anchored regular expressions

    > /^ul|ol$/i.test('symbol')
    true
Merge branch 'bobslaede-patch-1'
Merge branch 'flying-sheep-patch-destroy-listeners'